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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 878 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.7 × 15 =
  2. 2.9 × 15 =
  3. 3.8 × 15 =
  4. 4.27 × 15 =
  5. 5.60 × 15 =
  6. 6.50 × 15 =
  7. 7.16 × 15 =
  8. 8.38 × 15 =
  9. 9.18 × 15 =
  10. 10.63 × 15 =
  11. 11.60 × 15 =
  12. 12.9 × 15 =
  13. 13.49 × 15 =
  14. 14.7 × 15 =
  15. 15.7 × 15 =
  16. 16.38 × 15 =
  17. 17.18 × 15 =
  18. 18.27 × 15 =
  19. 19.19 × 15 =
  20. 20.26 × 15 =
  21. 21.6 × 15 =
  22. 22.5 × 15 =
  23. 23.34 × 15 =
  24. 24.7 × 15 =
  25. 25.35 × 15 =
  26. 26.33 × 15 =
  27. 27.12 × 15 =
  28. 28.21 × 15 =
  29. 29.41 × 15 =
  30. 30.60 × 15 =
  31. 31.10 × 15 =
  32. 32.20 × 15 =
  33. 33.60 × 15 =
  34. 34.53 × 15 =
  35. 35.56 × 15 =
  36. 36.54 × 15 =
  37. 37.10 × 15 =
  38. 38.22 × 15 =
  39. 39.54 × 15 =
  40. 40.15 × 15 =

Answer key

  1. 105
  2. 135
  3. 120
  4. 405
  5. 900
  6. 750
  7. 240
  8. 570
  9. 270
  10. 945
  11. 900
  12. 135
  13. 735
  14. 105
  15. 105
  16. 570
  17. 270
  18. 405
  19. 285
  20. 390
  21. 90
  22. 75
  23. 510
  24. 105
  25. 525
  26. 495
  27. 180
  28. 315
  29. 615
  30. 900
  31. 150
  32. 300
  33. 900
  34. 795
  35. 840
  36. 810
  37. 150
  38. 330
  39. 810
  40. 225

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